IVGCVSW-3694 Add ArgMinMax implementation for Ref
* Add ArgMinMax implementation
* Add utility function to get number of elements between axis
* Add utility function to get unsigned axis
* Unit tests for ArgMinMax function
Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I7bc3d610dda9526190187eb87394a8ed7a4b5cdd
diff --git a/src/backends/reference/workloads/ArgMinMax.cpp b/src/backends/reference/workloads/ArgMinMax.cpp
new file mode 100644
index 0000000..2687a4e
--- /dev/null
+++ b/src/backends/reference/workloads/ArgMinMax.cpp
@@ -0,0 +1,45 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "ArgMinMax.hpp"
+
+#include <TensorUtils.hpp>
+
+#include <boost/numeric/conversion/cast.hpp>
+
+namespace armnn
+{
+
+void ArgMinMax(Decoder<float>& in, int32_t* out, const TensorInfo& inputTensorInfo,
+ const TensorInfo& outputTensorInfo, ArgMinMaxFunction function, int axis)
+{
+ unsigned int uAxis = armnnUtils::GetUnsignedAxis(inputTensorInfo.GetNumDimensions(), axis);
+
+ const unsigned int outerElements = armnnUtils::GetNumElementsBetween(inputTensorInfo.GetShape(), 0, uAxis);
+ const unsigned int axisSize = inputTensorInfo.GetShape()[uAxis];
+ const unsigned int innerElements = armnnUtils::GetNumElementsBetween(inputTensorInfo.GetShape(),
+ uAxis + 1,
+ inputTensorInfo.GetNumDimensions());
+
+ for (unsigned int outer = 0; outer < outerElements; ++outer) {
+ for (unsigned int inner = 0; inner < innerElements; ++inner) {
+ in[outer * axisSize * innerElements + inner];
+ auto tmpValue = in.Get();
+ unsigned int tmpIndex = 0;
+ for (unsigned int i = 1; i < axisSize; ++i) {
+ in[(outer * axisSize * innerElements) + (i * innerElements) + inner];
+ const auto& value = in.Get();
+ if ((function == armnn::ArgMinMaxFunction::Min && value < tmpValue) ||
+ (function == armnn::ArgMinMaxFunction::Max && value > tmpValue)) {
+ tmpValue = value;
+ tmpIndex = i;
+ }
+ }
+ out[outer * innerElements + inner] = boost::numeric_cast<int32_t>(tmpIndex);
+ }
+ }
+}
+
+} //namespace armnn